Fig. 3

Automatic Barcode Gap Discovery. The number of identified groups is plotted over the prior intraspecific divergence used to identify the barcode gap. Major monophyletic groups, corresponding to clades in Fig. 2, are shown close to the respective points; minor groups, comprised either by a single OTU or by two OTUs, are detailed in the text. If possible, the method recursively splits (blue circles) the original partition (green circles), but in most case they overlap (red circles)